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IronRidge•UFO

Analysis by Marcus & Team

IronRidge UFO: Panel Thickness Compatibility Issue

Diagnosing solar panel thickness incompatibility with IronRidge UFO clamps. Ensure proper mounting, NEC compliance, and system safety for residential solar.

Frequently Asked Questions

•What is the recommended torque specification for IronRidge UFO clamps?

Refer to the IronRidge installation manual for the specific torque specification for your model of UFO clamp. Torque values vary depending on the panel thickness and mounting configuration.

•How do I verify proper grounding of the solar panels using IronRidge UFO clamps?

Use a multimeter to measure the resistance between the panel frame and the racking system grounding point. Resistance should be less than 1 ohm. Consult NEC 690.43 for grounding requirements.

•Where can I find the installation manual and datasheets for IronRidge UFO clamps?

Visit the IronRidge website (www.ironridge.com) or contact their technical support team.

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Marcus leads the technical research department at Storage Faults. Together with a team of systems analysts, he specializes in translating complex solar storage error codes into actionable diagnostic steps for the US market.

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Common Causes:

Use of solar panels exceeding the maximum allowable thickness specified for the IronRidge UFO clamp.
Incorrect clamp system or torque application.
Deformation or damage to the clamp itself, reducing its effective clamping range.
Accumulation of debris (e.g., dirt, leaves) between the panel and the clamp, effectively increasing panel thickness.
Thermal expansion and contraction of the panels and racking system, leading to clamp loosening.
Mismatched components where the panels used are not compatible with the racking system.

Technical Overview:

The IronRidge UFO (Universal Fastening Object) clamp is designed to accommodate a specific range of solar panel thicknesses. Exceeding the maximum thickness prevents proper clamp engagement and secure attachment. Insufficient clamping force compromises the mechanical integrity of the solar array. Clamps rely on friction and compression to maintain panel position and electrical grounding continuity. Panel thickness variations outside the UFO clamp's design parameters can lead to system failure. Improper grounding can lead to electrical hazards.

What to Look For:

Inability to securely fasten solar panels to the racking system using IronRidge UFO clamps. Panels may be loose or exhibit excessive movement. Risk of panel detachment during high winds or snow loads.

Expert Tip:

Use a digital torque wrench with audible feedback to ensure accurate torque application on the IronRidge UFO clamps. Over-torquing can damage the clamp or the panel. Under-torquing can lead to loosening over time. Consider using a thread-locking compound on the clamp bolts to prevent loosening due to vibration.

Important Warnings:

High DC voltage is present in solar arrays. Always disconnect DC power before performing any maintenance or repairs. Follow NEC 690 rapid shutdown procedures. Only qualified electricians should work on solar PV systems. Improper system or maintenance can result in electrical shock, arc flash, or fire hazards. Ensure proper grounding to prevent electrocution. Wear appropriate personal protective equipment (PPE), including insulated gloves and safety glasses.

Solution:

1

Disconnect the DC power at the inverter and solar array disconnect switches according to NEC 690 guidelines. Verify zero voltage using a calibrated multimeter.
2

Visually inspect all IronRidge UFO clamps for proper engagement and tightness. Use a calibrated torque wrench to verify torque specifications per IronRidge system manual.
3

Measure the thickness of the solar panels using calipers to confirm they are within the specified range for the UFO clamps. Compare to the IronRidge datasheet.
4

Check for debris or obstructions between the panel and the clamp. Clean the surfaces thoroughly.
5

If panel thickness exceeds clamp range, replace with compatible panels or utilize alternative mounting hardware recommended by IronRidge.
6

Verify electrical grounding continuity between the panels and the racking system using a multimeter. Resistance should be less than 1 ohm. Correct any grounding issues immediately.
7

After completing all repairs, re-energize the DC system and verify normal operation.

Prevention:

Verify solar panel thickness compatibility with IronRidge UFO clamps during system design and procurement.
Follow IronRidge system instructions precisely, including torque specifications.
Conduct regular visual inspections of the racking system and clamps for any signs of loosening or damage.
Remove debris and obstructions from the panels and clamps periodically.
Retorque all mounting hardware annually, especially after significant weather events.